SNAPSHOT/TSC can collect live performance data from multiple AS/400s and show the data on a single PC.

You can therefore have a SNAPSHOT/TSC Enterprise-wide Console. You could easily create your own View showing the 'live' response time of your 5 AS/400s, either on a single graph with a 3d bar chart, 5 separate charts or one chart with 2 systems and another chart with the other 3 systems.